CONTENTS 
Page. 
Introduction 7 
Methods 9 
Bacillus tuberculosis 10 
Original experiments 10 
Conclusion 30 
The effects of dead tuberclfe bacilli 30 
Review of the work of others upon the thermal death point of the tubercle 
bacillus 34 
Bacillus typhosus 48 
Review of the work of others. 48 
Original experiments 51 
Conclusion 56 
Bacillus diphtherise 56 
Review of the work of others 56 
Original experiments 57 
Conclusion 61 
Vibrio cholerse 62 
Review of the work of others 62 
Original experiments 63 
Conclusion 71 
Bacillus dysenterise 71 
Review of the work of others 71 
Original experiments 71 
Conclusion 78 
Micrococcus melitensis 79 
Review of the work of others 79 
Original experiments 79 
Conclusion 80 
General summary and conclusions 81 
(5) 
